PROPERTIES OF CORN COB ASH CONCRETE.
PROPERTIES OF CORN COB ASH CONCRETE.
No Thumbnail Available
Date
2012-08
Authors
AIMOLA, TAIWO,
CHRISTOPHER.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
This thesis studied the behavior Corn Cob Ash (CCA) concrete. The study also
investigated the effect of Corn Cob Ash on cement and as a partial replacement for
cement. The behavior of Corn Cob Ash concrete in aggressive chemical media was then
investigated. Chemical analysis of the CCA to determine the elemental oxide
composition revealed that it was pozzolanic. CCA is classified in class F using ASTM
C618. The effect of using CCA on water/cement ratio of the standard consistency paste
as well as initial and final setting times of cement paste revealed that both initial and
final setting times increased with increase in the CCA content. Increased substitution of
cement with CCA did not affect the soundness of cement adversely. The strength
properties of Corn Cob (CCA) concrete were studied using up to 50% CCA as
replacement for cement in concrete. The strength of CCA concrete increased with
curing period but decreased with increase in CCA content. Increased replacement of
cement with CCA reduced the density of concrete and there was a decrease in weight as
curing age of cube increased. Durability study of CCA concrete carried out with
specimen immersed in 5% and 10% solutions of Acetic acid, Sulphuric acid and
Sodium sulphate solutions revealed that in compressive strength increased as age of
curing increased in acidic solutions. Loss of weight of CCA concrete with age in
chemical solution increases with the increasing acid concentration. For each set of
specimen, it was observed that as the acid concentration increases, the extent of surface
deterioration also increased.
Description
A DISSERTATION SUBMITTED TO THE POST- GRADUATE
SCHOOL, AHMADU BELLO UNIVERSITY, ZARIA
IN PARTIAL FUFILLMENT FOR THE AWARD OF DOCTOR OF
PHILOSOPHY IN CIVIL ENGINEERING.
Keywords
PROPERTIES,, CORN,, COB ASH,, CONCRETE.